docs: explanation of how to use the session filter to protect pages

[datamweb]

Hello friends.
We have answered how to protect routes by several users in several discussions.
However, I recently received a similar message about how to protect the site panel.
I have covered this topic in this PR.

[datamweb]

Actually, I wanted to make the route protection more understandable by changing the session filter, but I think you disagree with this change. So I did nothing.

if (url_is('login*') || url_is('register*')){
    return;
}

Restrict Admin's Routes

For example, if you want to limit all routes leading to localhost:8080/admin and localhost:8080/panel, you need to add the following code in the app\Config\Filters.php file.

public $filters = [
    'session' => [
        'before' => [
            'admin*', 
            'panel*',
        ]
    ]
];

[MGatner]

LGTM!